Al Ajlan، M. A.، و Zairi، M. (2006). Critical success factors in customer relationship management " CRM " implementation: An empirical study and proposed generic model of best practice (رسالة دكتوراه غير منشورة). University of Bradford، برادفورد. مسترجع من http://search.mandumah.com/Record/599043
Al Ajlan، Mohammed A.، و Mohammad Zairi. "Critical Success Factors in Customer Relationship Management " CRM " Implementation: An Empirical Study and Proposed Generic Model of Best Practice" رسالة دكتوراه. University of Bradford، برادفورد، 2006. مسترجع من http://search.mandumah.com/Record/599043